16491250944 has 288 divisors, whose sum is σ = 58670976000. Its totient is φ = 4463548416.

The previous prime is 16491250943. The next prime is 16491250949. The reversal of 16491250944 is 44905219461.

16491250944 is a `hidden beast` number, since 16 + 4 + 91 + 2 + 509 + 44 = 666.

It is a tau number, because it is divible by the number of its divisors (288).

It is a super-2 number, since 2×16491250944² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 16491250944.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16491250943) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 910327 + ... + 928265.

Almost surely, 2^16491250944 is an apocalyptic number.

16491250944 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16491250944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29335488000).

16491250944 is an abundant number, since it is smaller than the sum of its proper divisors (42179725056).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16491250944 is a wasteful number, since it uses less digits than its factorization.

16491250944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17990 (or 17970 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 45.

The spelling of 16491250944 in words is "sixteen billion, four hundred ninety-one million, two hundred fifty thousand, nine hundred forty-four".